Download Zoology Department

‫بسم هللا الرحمن الرحيم‬
King Saud University
Zoology Department
First Mid-Term Examination –ZOO 106
Name:
Q.1
No:
Group:
Circle the letter beside the most correct answer in the following
questions:
(10 points)
1.The molecular formula of monosaccharides is multiple of:
(a)
C2H2O
(b)
CH2O
(c)
CH2O2
(d)
C2H2O2
2. The main component of phospholipids is:
(a)
Two fatty acids + 1 glycerol + phosphate group
(b)
Three fatty acids + 1 glycerol + Phosphate group
(c)
Three fatty acids and phosphate group
(d)
Two fatty acids and phosphate group
3. Collagen is a type of
(a)
Structural protein
(b)
Storage protein
(c)
Contractile protein
(d)
Defensive protein
(b)
Studded with ribosome
4. Rough endoplasmic reticulum
(a)
Lack ribosomes
(c)
Connected to the nuclear envelope
(d)
Both b and c
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5. The microfilaments:
(a)
Its diameter larger than the microtubules.
(b)
It forms the spindle fibers.
(c)
It forms the nuclear lamina.
(d)
It is formed of actin.
6. Oxygen has an atomic number of 8; therefore it must to have
(a)
8 electrons
(b)
(d)
a and b are correct
8 protons
(e)
(c)
8 neutrons
a, b and c are correct
7. What characterizes a prokaryotic cell?
(b)
The presence of mitochondria.
(b)
The absence of membrane bound nucleus
(c)
The presence of a nucleus with no DNA
(d)
Having a cell wall without a cell membrane.
8. Which of the following is a polar covalent bond?
(a)
H—H
(b)
C—C
(c)
H—O
(d)
C—H
(e)
O—O
9. Which of the two functional groups are always found in amino acids?
10.
(a)
Amine and sulfhydryl
(b) Carbonyl and carboxyl
(c)
Carboxyl and amine
(d)
Ketone and amine
At which level of protein structure are interactions between R groups
most important?
(a)
(c)
Primary
Tertiary
(b)
(d)
Secondary
Quaternary
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Q.2
Place the sign (√) beside the correct answer and (X) beside the false
answer and correct the wrong statements:
(15 points)
1. ( ) Carbon atom shares four electrons with oxygen in CO2 molecule.
2. ( ) Starch can be digested by humans.
3 ( ) Saturated fatty acids contain double bonds between carbon atoms.
4. ( ) The mature plant cell has very small vacuoles.
5. ( ) Nucleolus synthesizes ribosomal subunits.
6. ( ) 9 triplet structure is present in centriols.
7. ( ) Organic compounds containing hydroxyl groups are called alcohols.
8. ( ) Stored polysaccharides in animals are known as starch.
9. ( ) In cellulose, all glucose monomers are in configuration.
10. ( ) Lipids are not polymers.
11. ( ) Quaternary structure means that protein is formed of only one
polypeptide chain.
12. ( ) Golgi apparatus has cis and trans faces.
13. ( ) Amyloplasts contain pigments giving yellow color.
14. ( ) Peroxisomes detoxify alcohols.
15. ( ) Bacterial flagellum is made of flagellin.
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Q.3
Use the most appropriate words from the following list to fill the
spaces of the sentences below:
SER
(15 points)
Chloroplasts
Golgi apparatus
Virus
Lactose
Peroxisomes
Proteins
Plasmodesmata
Eukaryotes
Lysosomes
RER
Thylokoids
Central vacuoles
Cytoskeleton
Hydrolysis
Hydrogen bonds
Hydrophilic molecules
Fats
Carboxyl group
1.
............................. is digestion (breakdown) of sucrose to glucose.
2.
............................. produce the secondary structure in proteins.
3.
............................. yield highest energy when oxidized.
4.
............................. is a disaccharide in the milk.
5.
............................. involved in storage disease such as Tay-sachs.
6.
............................. involved in the synthesis of steroid hormones .
7.
............................. present in chloroplasts.
8.
............................. sorts out mixtures of substances and sends them to
their proper destinations.
9.
............................. supports and maintains the structure of cells.
10.
............................. structures found between plant cells.
11.
............................. convert light energy to chemical energy.
12.
............................. it contains either RNA or DNA as genetic material.
13.
............................. produce H2O2 as a by-product.
14.
............................. an acidic group present in living organism.
15.
............................. has affinity for water.
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Q.4
Write one difference between the following pairs:
Mitochondria
Chloroplasts
Lysosomes
Peroxisomes
SER
RER
Cilia
Flagella
Glucose
Fructose
Nucleoid
Nucleus
Glycogen
Starch
(7 points)
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Q.5
Identify and label the following diagram:
(3 points)
(A) Identify _________________________________________
B ----------------
C --------------
D --------------------------
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